Guiltware

from Jargon File (4.4.4, 14 Aug 2003)
guiltware
 /gilt'weir/, n.

   1. A piece of {freeware} decorated with a message telling one how long
   and hard the author worked on it and intimating that one is a no-good
   freeloader if one does not immediately send the poor suffering martyr
   gobs of money.

   2. A piece of {shareware} that works.
    
from The Free On-line Dictionary of Computing (8 July 2008)
guiltware

   /gilt'weir/ 1. A piece of {freeware} decorated with a message
   telling one how long and hard the author worked on it and
   intimating that one is a no-good freeloader if one does not
   immediately send the poor suffering martyr gobs of money.

   2. {Shareware} that works.

   [{Jargon File}]
    

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